Cooperative optimization of two-city public transit networks based on carbon emission penalty
FAN Yuhong
LU Haoran
LUO Sida
SHAO Chunfu
Abstract：To further promote intercity public transit construction and foster regional integration,this paper introduces a collaborative optimization model for a dual-city public transit network,incorporat-ing a penalty for carbon emissions. Firstly,a cooperative mechanism is developed for the coordinated development of public transit based on carbon emissions in the two-city system within the metropolitan area. This framework introduces the novel concept of a "carbon emission penalty" which represents the financial burden that smaller cities must bear to compensate larger cities for the operation of inter-city public transit services. Secondly,the paper presents two distinct layouts for intercity public transit systems. Utilizing the parsimonious continuum approach,it calculates the user costs,operational ex-penses,and overall carbon emissions associated with each transit plan. Then,with the goal of minimiz-ing the total system cost,which is the sum of user cost and operation cost within the two-city public transit system,a bi-level programming model for the design of network organization under elastic de-mand is established. This model addresses the collaborative optimization challenge between intercity and urban public transit systems. Given the model's decision variables are trivial,a genetic algorithm is employed for its solution. Finally,an empirical analysis is conducted with the two-city system of Xi'an and Xianyang as an example,aiming to provide decision-making support for the coordinated lay-out of the public transit network. The research results indicate that the establishment of intercity public transit can enhance the service level of public transit in smaller cities and curtail traffic-related carbon emissions. The differences between the two public transit network layouts are mainly reflected in the public transit service level and operating costs in the smaller city. Whether the construction of intercity public transit can reduce carbon emissions mainly depends on the level of travel demand,the distance between cities,and the proportion of intercity travel in the two-city system.
Keywords：two-city systemcollaborative optimization of public transit networkparsimonious continuum approachcarbon emission penaltybi-level programming
Publication Date：2024-08-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：17( 65-81 )